Attwood Bilge Blower performance gains

I did a search on this as it was recently indicated that my idea of adding one of these blowers to one of the air inlets hindered performance instead of helping on the 4-tecs.

My search found that a few have done it, but did not post results...at least that i could find.

I am a bit reluctant to drill an add'l port, however i think i have a little room to increase the size of my current ~3" ports to 4" with custom aluminum/stainless inlet hose fittings. I have an account at an industrial hose distributor and will be going to a smooth bore on all hoses.

Well.. here's my take on it.
4" blower is located @ top of intake just below glovebox.Cut & repositioned intake to "dropoff" close to rectifier & 4" hose inlet for SC,but not to close.When turned on,I can feel a "somewhat" of a substancial flow of heat exiting the florites @ the back.Performance gains?..Im sure,but it's kinda hard to measure.I have taken notice that when I beach for 10 /15 minutes & leave it on,it starts up running a higher RPM(20 to 30 maybe) & substains that until I run WOT for an extended time,Then the RPMs will start creeping down slowly.Now when I run without blower alltogether,I will notice a negligable decline in RPMs overall @ startup & WOT.
But there are so many variables it's hard to pin down a solid opinion,To me,I like the idea of cooler air being introduced to the rectifier/inlet area

You don't want to totally block any inlet with a fan. It will end up being a restriction as the super charger can move the air much faster than the fan. PPG's original Level one kit originally used a 3" fan at the inlet of the stock air box. Unfortuately, I bought one (and it was not cheep), if anything it was worse than stock. I know you are talking 4", but it still won't keep up and will be a restriction. Just use the 4" smooth bore hose, and maybe a K&N filter. You will be glad you did.

I've installed atwoods in both my RXP and jtpmedic's RXT...On both I mounted them in the rear to SUCK air out, creating a vacuum affect when on...My air intake is 4" with a large filter near the inlet just under the storage box...When the blower is on, you can feel all heat coming from the rear of my seat...

During Mudbug, my fan was ALWAY on...not one time did it heat fade, especially when running WOT for miles, then creeping at a no wake zone, then WOT again...

I've got blowers installed in the front vent and rear vent. The front one blows dirrectly on my 4" intake SS filter, The rear is in-line in the exhaust vent. cannot quantify gains but it does keep fresh air flowing in/out of the hull which has to help some. I did gain about 1 mph when I removed my front storage bin and left the hood cracked about 2 inches. I was very surprised at this. Truly the more fresh air you can get into the sc the better it likes it. Of course we cannot run with the hood open unless it's a controlled test but if we could get more air through the hood it would help a lot.

Is it just me or are we all talking about two different things here? On one hand people are commenting on blowers to push (or pull) the heat out of the engine bay. On the the other hand, people are talking about putting a fan in the engine inlet tube to the SC. Two different animals altogether. I believe the consensus is that a fan to move air into the hull for cooling = good thing. A fan in the air intake that eventually goes to the SC = restriction = bad thing.